diff --git a/src/mainboard/kontron/bsl6/devicetree.cb b/src/mainboard/kontron/bsl6/devicetree.cb
index 1659834..08b90ce 100644
--- a/src/mainboard/kontron/bsl6/devicetree.cb
+++ b/src/mainboard/kontron/bsl6/devicetree.cb
@@ -66,10 +66,9 @@
 	device cpu_cluster 0 on end
 
 	device domain 0 on
-		device pci 00.0 on  end	# Host Bridge
-		device pci 02.0 on  end	# Integrated Graphics Device
-		device pci 08.0 on  end	# Gaussian Mixture Model
-		device pci 14.0 on	# USB xHCI
+		device ref igpu		on  end
+		device ref gmm		on  end
+		device ref south_xhci	on
 			register "usb2_ports" = "{
 				[0] = USB2_PORT_LONG(OC0),
 				[1] = USB2_PORT_LONG(OC0),
@@ -78,9 +77,9 @@
 				[4] = USB2_PORT_LONG(OC2), /* Debug */
 			}"
 		end
-		device pci 14.2 on  end	# Thermal Subsystem
-		device pci 16.0 on  end	# Management Engine Interface 1
-		device pci 17.0 on	# SATA
+		device ref thermal	on  end
+		device ref heci1	on  end
+		device ref sata		on
 			register "SataSalpSupport" = "1"
 			register "SataPortsEnable" = "{
 				[0] = 1,
@@ -88,16 +87,16 @@
 				[2] = 1,
 			}"
 		end
-		device pci 1d.0 on	# PCI Express Port 9 (COMe 0)
+		device ref pcie_rp9	on
 			register "PcieRpEnable[8]" = "1"
 		end
-		device pci 1d.1 on	# PCI Express Port 10 (COMe 1)
+		device ref pcie_rp10	on
 			register "PcieRpEnable[9]" = "1"
 		end
-		device pci 1d.2 on	# PCI Express Port 11 (COMe 2)
+		device ref pcie_rp11	on
 			register "PcieRpEnable[10]" = "1"
 		end
-		device pci 1f.0 on	# LPC Interface
+		device ref lpc_espi	on
 			register "serirq_mode" = "SERIRQ_CONTINUOUS"
 
 			# EC/kempld at 0xa80/0xa81
@@ -111,14 +110,12 @@
 				device generic 0.0 on end # UART #0
 			end
 		end
-		device pci 1f.1 on  end	# P2SB
-		device pci 1f.2 on  end	# Power Management Controller
-		device pci 1f.4 on	# SMBus
+		device ref smbus	on
 			chip drivers/i2c/nct7802y
 				device i2c 0x2e on end
 			end
 		end
-		device pci 1f.5 on  end	# PCH SPI
-		device pci 1f.6 on  end	# GbE
+		device ref fast_spi	on  end
+		device ref gbe		on  end
 	end
 end
diff --git a/src/mainboard/kontron/bsl6/variants/boxer26/overridetree.cb b/src/mainboard/kontron/bsl6/variants/boxer26/overridetree.cb
index 9f300e9..f34375e 100644
--- a/src/mainboard/kontron/bsl6/variants/boxer26/overridetree.cb
+++ b/src/mainboard/kontron/bsl6/variants/boxer26/overridetree.cb
@@ -5,7 +5,7 @@
 	register "SkipExtGfxScan" = "1"
 
 	device domain 0 on
-		device pci 1f.0 on
+		device ref lpc_espi	on
 			chip ec/kontron/kempld
 				device generic 1.0 on # I2C
 					chip drivers/i2c/lm96000
@@ -40,16 +40,14 @@
 					end
 				end
 			end
-		end # LPC Interface
-		device pci 1f.4 on
+		end
+		device ref smbus	on
 			chip drivers/i2c/nct7802y
 				register "fan[1].mode" = "FAN_MANUAL"
 				register "fan[1].duty_cycle" = "100"
 
 				device i2c 0x2e on end
 			end
-		end # SMBus
-		device pci 1f.5 on  end # PCH SPI
-		device pci 1f.6 on  end # GbE # Debug
+		end
 	end
 end
diff --git a/src/mainboard/kontron/bsl6/variants/bsl6/overridetree.cb b/src/mainboard/kontron/bsl6/variants/bsl6/overridetree.cb
index 9cbe824..ecfcd6f 100644
--- a/src/mainboard/kontron/bsl6/variants/bsl6/overridetree.cb
+++ b/src/mainboard/kontron/bsl6/variants/bsl6/overridetree.cb
@@ -21,12 +21,12 @@
 	register "SataPortsEnable[3]"	= "1"
 
 	device domain 0 on
-		device pci 1c.0 on  end # PCI Express Port 1
-		device pci 1c.1 on  end # PCI Express Port 2
-		device pci 1c.2 on  end # PCI Express Port 3
-		device pci 1c.3 on  end # PCI Express Port 4
-		device pci 1d.3 on  end # PCI Express Port 12
-		device pci 1f.4 on
+		device ref pcie_rp1	on  end
+		device ref pcie_rp2	on  end
+		device ref pcie_rp3	on  end
+		device ref pcie_rp4	on  end
+		device ref pcie_rp12	on  end
+		device ref smbus	on
 			chip drivers/i2c/nct7802y
 				register "peci[0]" = "{ PECI_DOMAIN_0, 100 }"
 				register "fan[1].mode" = "FAN_SMART"
@@ -40,6 +40,6 @@
 
 				device i2c 0x2e on end
 			end
-		end # SMBus
+		end
 	end
 end